Answer:
The tuba
Explanation:
The tuba produces sound by vibrating or buzzing the lips into a large cupped mouth piece. It produces different pitches by changing the mouthpiece.
Answer:
They are usually found in the center and they are called embyro sacs.
Explanation:
We would have a hard time moving and your heart and other major organs would be easier to damage
Punctuated equilibrium, it is rapid evolution with little change in between
